usb: quirks: add control message delay for 1b1c:1b20

commit cb88a0588717ba6c756cb5972d75766b273a6817 upstream.

Corsair Strafe RGB keyboard does not respond to usb control messages
sometimes and hence generates timeouts.

Commit de3af5bf259d ("usb: quirks: add delay init quirk for Corsair
Strafe RGB keyboard") tried to fix those timeouts by adding
USB_QUIRK_DELAY_INIT.

Unfortunately, even with this quirk timeouts of usb_control_msg()
can still be seen, but with a lower frequency (approx. 1 out of 15):

[   29.103520] usb 1-8: string descriptor 0 read error: -110
[   34.363097] usb 1-8: can't set config #1, error -110

Adding further delays to different locations where usb control
messages are issued just moves the timeouts to other locations,
e.g.:

[   35.400533] usbhid 1-8:1.0: can't add hid device: -110
[   35.401014] usbhid: probe of 1-8:1.0 failed with error -110

The only way to reliably avoid those issues is having a pause after
each usb control message. In approx. 200 boot cycles no more timeouts
were seen.

Addionaly, keep USB_QUIRK_DELAY_INIT as it turned out to be necessary
to have the delay in hub_port_connect() after hub_port_init().

The overall boot time seems not to be influenced by these additional
delays, even on fast machines and lightweight distributions.

Fixes: de3af5bf259d ("usb: quirks: add delay init quirk for Corsair Strafe RGB keyboard")
Signed-off-by: Danilo Krummrich <danilokrummrich@dk-develop.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c
index ab11ca3..16fca16 100644 (file)
--- a/drivers/usb/core/message.c
+++ b/drivers/usb/core/message.c
@@ -150,6 +150,10 @@ int usb_control_msg(struct usb_device *dev, unsigned int pipe, __u8 request,
 
        ret = usb_internal_control_msg(dev, pipe, dr, data, size, timeout);
 
+       /* Linger a bit, prior to the next control message. */
+       if (dev->quirks & USB_QUIRK_DELAY_CTRL_MSG)
+               msleep(200);
+
        kfree(dr);
 
        return ret;

diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c
index ce0017a..215fdef 100644 (file)
--- a/drivers/usb/core/quirks.c
+++ b/drivers/usb/core/quirks.c
@@ -210,7 +210,8 @@ static const struct usb_device_id usb_quirk_list[] = {
        { USB_DEVICE(0x1b1c, 0x1b13), .driver_info = USB_QUIRK_DELAY_INIT },
 
        /* Corsair Strafe RGB */
-       { USB_DEVICE(0x1b1c, 0x1b20), .driver_info = USB_QUIRK_DELAY_INIT },
+       { USB_DEVICE(0x1b1c, 0x1b20), .driver_info = USB_QUIRK_DELAY_INIT |
+         USB_QUIRK_DELAY_CTRL_MSG },
 
        /* Corsair K70 LUX */
        { USB_DEVICE(0x1b1c, 0x1b36), .driver_info = USB_QUIRK_DELAY_INIT },

diff --git a/include/linux/usb/quirks.h b/include/linux/usb/quirks.h
index 15c99b7..abada78 100644 (file)
--- a/include/linux/usb/quirks.h
+++ b/include/linux/usb/quirks.h
@@ -50,4 +50,7 @@
  */
 #define USB_QUIRK_LINEAR_FRAME_INTR_BINTERVAL  BIT(11)
 
+/* Device needs a pause after every control message. */
+#define USB_QUIRK_DELAY_CTRL_MSG               BIT(13)
+
 #endif /* __LINUX_USB_QUIRKS_H */